Neutron activation analysis at the Illinois State Geological Survey

Ope

Analyses of some Illinois rocks for gold

Ope

Advanced physical fine coal cleaning by ISGS aggregate flotation : final technical report, [September 1, 1987 through August 31, 1988]

Final Technical Report, September 1, 1987 through August 31, 1986.Submitted to the Illinois Department of Energy and Natural Resources and the Ilinois Coal Industry Committee through the Center for Research on Sulfur in CoalOpe

Advanced physical fine coal cleaning by ISGS aggregate flotation : final technical report, [September 1, 1987 through August 31, 1988]

Final Technical Report, September 1, 1987 through August 31, 1986.Submitted to the Illinois Department of Energy and Natural Resources and the Ilinois Coal Industry Committee through the Center for Research on Sulfur in CoalOpe

Radioactive sulfur tracer study of sulfur removal in the charring of Illinois coals at 650C

"October 1984.""Final report to the Coal Research Board, Illinois Department of Energy and Natural Resources.""Contract 1-5-90071."Includes bibliographical references (p. 23-24)

Advanced characterization of forms of chlorine, organic sulfur and trace elements in available coals from operating Illinois mines. Quarterly report, 1 December 1994--28 February 1995

The goals of the study are (1) to use X-ray absorption near-edge spectroscopy (XANES) to determine forms of chlorine (inorganic, ionic, and organic) and forms of organic sulfur (organic sulfide and thiophenic sulfur) in as-shipped coals from Illinois mines, (2) to obtain basic data on chlorine removal via froth flotation at fine ({minus}200 mesh) and ultrafine ({minus}400 mesh) particle sizes, and (3) to evaluate XANES for direct assessment of the organic/inorganic affinities of trace elements. This is a cooperative effort among the Illinois State Geological Survey, the University of Kentucky, and Western Kentucky University. In this quarter, chlorine leachability during fine wet grinding of 21 coal samples was examined. The results show a general improvement in chlorine removal by grinding coals to {minus}200 mesh, but do not show further improvement by additional grinding to {minus}400 mesh. The chlorine and sulfur spectra of five coals , each from a distinct geographic location in Illinois, were examined. The chlorine XANES spectra for the five coals are similar and chloride anion was determined to be the predominant form of chlorine. The sulfur XANES data for the same coals show that a majority (61% to 82%) of organic sulfur in the coals is contributed from thiophenic sulfur. The distribution of organic sulfur shows that the high sulfur coals tend to have more organic sulfide than low sulfur coals. A more detailed interpretation may be possible after a complete analysis of all the samples selected. Evaluating the possibility of XANES for direct assessment of the organic/inorganic affinities of trace elements in an Illinois coal was completed